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Polysulfone series resin polymerization dehydration process

A polymerization dehydration and resin technology, applied in the production of bulk chemicals, etc., can solve the problems of cost, inability to physically separate, etc., achieve continuous and efficient process, shorten the polymerization production cycle, and have the effect of no solvent loss

Active Publication Date: 2022-05-20
FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it needs to consume 30-50wt% of the total solvent for dehydration operation, so as to ensure that the water in the kettle is removed in time
Because water and solvent can be miscible in any proportion, they cannot be physically separated

Method used

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  • Polysulfone series resin polymerization dehydration process
  • Polysulfone series resin polymerization dehydration process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 9.02 kg of 4,4-dichlorodiphenyl sulfone, 6.51 kg of bisphenol A, 5.25 kg of potassium carbonate, and 65 kg of solvent dimethyl sulfoxide into a 100L polymerization reactor. All the raw materials were put into the reaction kettle, after the inside of the kettle was evacuated to ≤-0.08MPa, nitrogen gas was introduced to make the pressure inside the kettle reach ≥0.00MPa, and after nitrogen replacement three times, the reaction at normal pressure in the kettle was maintained, and the polymerization temperature rose to 189°C. The temperature of the circulating water in the condenser jacket is kept constant to 2°C by a refrigerator to ensure that the solvent and water vapor evaporated in the kettle can be quickly condensed into liquid. The cooled mixed liquid is passed into the molecular still, and the mixed liquid is scraped back and forth on the hot plate by the scraper. Reduce the internal pressure of the molecular still to 0.1mbar, the distance between the cooling pl...

Embodiment 2

[0040] Add 8.7kg of 4,4-dichlorodiphenylsulfone, 5.21kg of 4,4-dihydroxybiphenyl, 5.7kg of potassium carbonate, and 55kg of solvent dimethylacetamide into a 100L polymerization reactor. All the raw materials were put into the reaction kettle, and after the inside of the kettle was evacuated to ≤-0.08MPa, nitrogen gas was introduced to make the pressure in the kettle reach ≥0.00MPa. After three times of nitrogen replacement, the reaction at normal pressure in the kettle was maintained, and the polymerization temperature rose to 166°C. The temperature of the circulating water in the condenser jacket is kept constant to 10°C by a refrigerator to ensure that the solvent and water vapor in the kettle can be quickly condensed into liquid. The cooled mixed liquid is passed into the molecular still, and the mixed liquid is scraped back and forth on the hot plate by the scraper. Reduce the internal pressure of the molecular still to 0.1mbar, the distance between the cooling plate and t...

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Abstract

The invention belongs to the technical field of polymer materials, and specifically relates to a polysulfone series resin polymerization dehydration process. During the polymerization process, a rapid dehydration process is adopted, the temperature is raised to the boiling point of a solvent, and the solvent and water are azeotropically dehydrated. The ultra-low temperature condenser is used with a new molecular still to quickly separate the mixed liquid in a short distance, recover water and pure solvent separately, and return the almost anhydrous pure solvent directly to the polymerization kettle, which can save 30‑50wt of solvent used for dehydration %, without any pollution to the product, and without dehydrating agent residue, the process is green and environmentally friendly. At the same time, the fast and efficient dehydration process and high dehydration temperature can shorten the production cycle from 14‑16h to 10‑12h, and shorten the polymerization cycle by 25 ‑28%. The obtained polysulfone polymer material has the advantages of high purity, low ash content, stable performance, low cost, no pollution, etc., and can be used in medical equipment, aerospace, auto parts, electronic components and other fields.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polysulfone series resin polymerization dehydration process. Background technique [0002] Polysulfone is a high molecular polymer, an amorphous, thermoplastic resin. Its characteristics are: excellent mechanical properties, high rigidity, wear resistance, high strength, etc. Due to its good characteristics, polysulfone has been widely used in medical equipment, aerospace, electronics and other high-end materials. [0003] At present, the most advanced production technology of polysulfone polymer materials is a one-step synthesis method. One-step synthesis mainly includes polymerization process and product purification process. [0004] Polymerization process: main raw materials 4,4'-dichlorodiphenyl sulfone, bisphenol A or bisphenol S or 4,4-dihydroxybiphenyl, potassium carbonate or potassium bicarbonate, sodium carbonate, etc., commonly used solvents a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08G75/23
CPCC08G75/20C08G75/23Y02P20/54
Inventor 王敏黄森彪廖广明
Owner FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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